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50+ Years
experience
Trusted HVAC Installation & Repair Services in Concord, CA
ACS Air Conditioning Systems has been a family-owned and operated HVAC contractor serving the East Bay Area since 1969. As the oldest Carrier Factory Authorized Dealer in the region, we specialize in residential and commercial HVAC installation, repair, and maintenance. Our union-trained technicians prioritize quality workmanship, using high-efficiency Carrier products to deliver reliable comfort solutions. With over 50 years of industry experience and a commitment to low-pressure sales, we focus on building long-term customer relationships through honest service.

Our team includes third-generation HVAC professionals who maintain rigorous standards for professionalism, ensuring meticulous attention to detail during every service call. We offer factory rebates, free consultations, and comprehensive solutions for heating, air conditioning, and indoor air quality systems.
Services
Air Conditioning Heating Carrier Products HVAC Installation Maintenance
Details
  • Year established: 1969
Highlights and features
  • 50+ years of HVAC experience since 1969
  • Family-owned business with third-generation technicians
  • Union-trained professionals for quality workmanship
  • Authorized Carrier dealer with factory rebates
  • 2,000+ satisfied residential and commercial customers
Associations and certifications
  • Carrier Factory Authorized Dealer
What people say
Meticulous work Thorough installation Prompt service Knowledgeable technicians Professional manner
Services
HVAC Installation
We specialize in residential and commercial HVAC system installation, including Carrier brand equipment. Our union-trained technicians ensure proper setup for optimal efficiency and longevity. Services cover complete system replacement, ductwork integration, and energy-efficient upgrades that reduce long-term operating costs while maintaining comfort standards.
Air Conditioning
Our AC services include Carrier system installation, repair, and maintenance for homes and businesses. Technicians handle central air conditioning units, ductless mini-splits, and commercial cooling solutions. We focus on energy efficiency improvements and proper refrigerant management to maintain peak performance during California's hottest months.
Heating Services
We provide comprehensive heating solutions covering furnaces, boilers, and heat pumps. Services include seasonal maintenance, emergency repairs, and system replacements using Carrier equipment. Our technicians address efficiency concerns and ensure proper heat distribution across residential and commercial properties.
Maintenance Plans
Our preventive maintenance programs cover HVAC system inspections, filter replacements, and efficiency testing. Regular service visits help identify potential issues before failures occur, extending equipment lifespan while maintaining manufacturer warranty requirements for residential and commercial clients.
Carrier Products
As a Carrier Factory Authorized Dealer, we offer complete lines of heating, cooling, and ventilation equipment. This includes ENERGY STAR-rated furnaces, air conditioners, heat pumps, and smart thermostats designed for energy efficiency. We provide expert guidance for selecting appropriate systems based on property size and climate needs.
People
Donna Pratt
President & Owner
Donna Pratt has led ACS Air Conditioning Systems since 1991, continuing the company's family-owned tradition. With over 50 years in the HVAC industry, she oversees operations while maintaining customer service standards established in 1969.
Doug Pratt
Co-Owner
Doug Pratt brings extensive HVAC expertise as co-owner, working alongside Donna to maintain technical excellence. With over 50 years in the industry, he focuses on service quality and technician training for residential and commercial projects.
Justin Pratt
Estimator/Project Manager
Justin Pratt serves as estimator and project manager, carrying third-generation HVAC expertise since joining in 2005. He manages system installations and coordinates service teams while maintaining family business values established in 1969.
Questions
What HVAC services do you offer?
We provide full-service HVAC solutions including installation, repair, and maintenance for residential and commercial heating, air conditioning, and ventilation systems using Carrier equipment.
Are you a licensed HVAC contractor?
Yes, we're a licensed HVAC contractor with union-trained technicians serving the East Bay Area since 1969 as a Carrier Factory Authorized Dealer.
Do you offer emergency HVAC repairs?
While we don't provide 24/7 emergency service, we prioritize urgent repair requests during regular business hours for residential and commercial clients.
What areas do you service?
We serve Concord, Walnut Creek, Danville, San Ramon, Pleasanton, Lafayette, and surrounding Bay Area communities for all HVAC needs.
Can you help with HVAC financing?
Yes, we offer financing options for new HVAC installations to qualified customers through our partnership programs with equipment manufacturers.
Do you work on non-Carrier systems?
While we specialize in Carrier products, our technicians can service most HVAC brands for repair and maintenance needs across residential and commercial properties.